参数资料
型号: MC7448VU867NC
厂商: Freescale Semiconductor
文件页数: 33/60页
文件大小: 0K
描述: IC MPU RISC 32BIT 360-FCCBGA
标准包装: 44
系列: MPC74xx
处理器类型: 32-位 MPC74xx PowerPC
速度: 867MHz
电压: 1V
安装类型: 表面贴装
封装/外壳: 360-CBGA,FCCBGA
供应商设备封装: 360-FCCBGA(25x25)
包装: 托盘
MPC7448 RISC Microprocessor Hardware Specifications, Rev. 4
Freescale Semiconductor
39
System Design Information
Figure 17. MPC7448 Power Down Sequencing Requirements
There is no requirement regarding AVDD during power down, but it is recommended that AVDD track VDD
within the RC time constant of the PLL filter circuit described in Section 9.2.2, “PLL Power Supply
Filtering” (nominally 100 s).
9.2.2
PLL Power Supply Filtering
The AVDD power signal is provided on the MPC7448 to provide power to the clock generation PLL. To
ensure stability of the internal clock, the power supplied to the AVDD input signal should be filtered of any
noise in the 500-KHz to 10-MHz resonant frequency range of the PLL. The circuit shown in Figure 18
using surface mount capacitors with minimum effective series inductance (ESL) is strongly recommended.
In addition to filtering noise from the AVDD input, it also provides the required delay between VDD and
The circuit should be placed as close as possible to the AVDD pin to minimize noise coupled from nearby
circuits. It is often possible to route directly from the capacitors to the AVDD pin, which is on the periphery
of the device footprint.
Figure 18. PLL Power Supply Filter Circuit
VDD
OVDD
no restrictions between VDD and OVDD
SYSCLK
0.9 V
AVDD
no restrictions between VDD and AVDD
note also restrictions between SYSCLK and OVDD
0.9 V
limit imposed by VDD if VDD ramps down first
limit imposed by OVDD if OVDD ramps down first
VDD
AVDD
10
Ω
2.2 F
GND
Low ESL Surface Mount Capacitors
相关PDF资料
PDF描述
MC7448VU667NC IC MPU RISC 32BIT 360-FCCBGA
MC7448VU600NC IC MPU RISC 32BIT 360-FCCBGA
MC7448VU1700LC IC MPU RISC 32BIT 360-FCCBGA
FMM36DREI CONN EDGECARD 72POS .156 EYELET
HSC60DTEF CONN EDGECARD 120POS .100 EYELET
相关代理商/技术参数
参数描述
MC7448VU867ND 功能描述:微处理器 - MPU APL8 RV2.2.1 1.0V 105C RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324
MC7455_1102476 功能描述:4G LTE FB 3G HSPA+ GNSS NAM&EMEA 制造商:sierra wireless 系列:* 包装:剪切带(CT) 零件状态:在售 安装类型:卡边 封装/外壳:模块 标准包装:100
MC7455_1103578 功能描述:4G LTE FB 3G HSPA+ GNSS NAM&EMEA 制造商:sierra wireless 系列:MC 零件状态:在售 功能:调制解调器 调制或协议:Beidou,Galileo,GLONASS,GPS,LTE,WCDMA 应用:通用 接口:USB 灵敏度:- 功率 - 输出:- 数据速率(最大值):300Mbps 特性:- 电压 - 电源:- 标准包装:100
MC7455ARX1000LF 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications
MC7455ARX1000LG 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications